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Eagles Run Murray Gray Cattle
Eagles Run Murray Gray Bulls
Eagles Run Cows & Heifers
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Eagles Run Murray Gray Calves
Philosophy on Cattle Breeding
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Bloodlines
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Indexes
Bloodlines
Indexes

Murray Grey Breed
Breed Character
Breed History
Breed History
Breed History
Breed Associations


Eagles Run Ranch makes extensive use of BREEDPLAN, a modern genetic evaluation system for beef cattle breeders. A short explanation of BREEDPLAN is also available on our site at BREEDPLAN. However, this page is going to discuss Murray Grey Selection Indexes. The following information has been condensed from the information provided by BREEDPLAN on these Murray Grey indexes.

All selection indexes are reported as an EBV, in units of net dollares of profit per bred cow ($) for a given market scenario. They reflect both the short term profit generated by a sire through the sale of his progeny, and the longer term profit generated by his daughters in a self replacing cow herd.

There are three different selection indexes calculated for Murray Greys. Details and graphics are under each Index Link including what traits are strongly considered and weighting applied to each trait to create the $Index figure for each animal on Breedplan. These Murray Grey Indexes are:

Supermarket Index - Estimates the genetic differences between animals in net profitability per bred cow for a herd targeting production of steers for the domestic supermarket trade. Steers are either finished on grass or grain (eg. 50 70 days) and then slaughtered at 17 months of age (average 1000 lbs live weight). Daughters are retained for breeding. In response to industry feedback regarding eating quality and tenderness, a small premium has been placed on marbling.

Long Fed Index - Estimates the genetic differences between animals in net profitability per bred cow for a herd targeting the production of steers for long fed export markets such as the Japanese market. It is assumed that the steers are pasture grown and then slaughtered at 22 months of age after 200 days on feed (average 1550 lbs live weight). Daughters are retained for breeding. There is a significant premium if steers attain good marbling.

Heavy Grass Fed Index - Estimates the genetic differences between animals in net profitability per bred cow for a herd targeting pasture finished steers for heavier grass fed markets. Steers are assumed marketed at 1280 lbs live weight (12 mm P8 fat depth) at 22 months of age. Daughters are retained for breeding. In response to industry feedback regarding eating quality and tenderness, a small premium has been placed on marbling.

As a participant of BREEDPLAN Performance Recording, and with credit and thanks to the Murray Grey Beef Cattle Society in Australia, we provide the following PDF files for the top 100 Murray Grey sires in each index. We have highlighted those bulls we use in our breeding program.

Top 100 Sires in the Heavy Grass Fed Index
Top 100 Sires in the Long Fed Index
Top 100 Sires in the Supermarket Index

An example table of index values for Eagles Run Tor 359T, one of our herdsires. You will note he offers exceptional value in the Heavy Grass Fed Index but is above Breed Average in the other indexes.

SELECTION INDEX VALUES
Market TargetIndex Value Breed Average
Long-Fed Export Index ($) +$ 32 +$ 25
Supermarket Index ($) +$ 40 +$ 29
Heavy Grass Fed Index ($) +$ 45 +$ 33
Explanation of $Index Values

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